Fastening device



FIG. 1 is a front perspective view of a fastening device showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a perspective view thereof, shown in a used condition with a box in broken lines;

FIG. 10 is an enlarged view of a circled portion 10 of FIG. 1; and,

FIG. 11 is an enlarged view of a circled portion 11 of FIG. 7.

The broken lines in the drawings depict portions of the fastening device that form no part of the claimed design. 

CLAIM The ornamental design for a fastening device, as shown and described. 